Secondary battery manufacturing method, secondary battery, welding apparatus thereof

摘要

A part has separator layers of resin laminated on each other with heat-resistant layers interposed among them and a sheath (laminated sheet) laid on each side of the laminated separator layers. The part is held, pressurized, and vibrated by a pressure vibrator and a jig receiver. The pressure vibrator and jig receiver are provided with projections that pressurize, vibrate, and break the heat-resistant layers, thereby melting and welding together the resin of the separator layers at the broken part.

主权项

1. A secondary battery manufacturing method comprising:
employing a welding jig that has a pressure vibrator, a jig receiver arranged at a position opposing to the pressure vibrator, and projections formed on both the pressure vibrator and the jig receiver; and driving the pressure vibrator to hold and pressurize in a laminated direction and vibrate a welding part having a structure in which a plurality of separator layers of resin and heat-resistant layers interposed among the separator layers are laminated on one another, thereby breaking the heat-resistant layers in the welding part and welding together the resin of the separator layers that joins together in the broken part, wherein an entire front end of each of the projections is shaped into a circular arc.